Conditions For Running DTC

WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The engine is operating on alternative fuel for an initial failure. The AF ECM will run this DTC in gasoline mode after an initial alternative fuel mode failure.
The MAP sensor signal indicates 31.17 in. Hg (105.23 kPa) or less.
A cam signal is monitored indicating the engine is cranking or running.